Separation and/or filtering device and extraction device
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Solution Overview
Problem
Existing separation and filtering devices for kitchen cooking vapors have limited filtration capacity and efficiency, requiring frequent maintenance and service intervals due to the gradual decrease in filter effectiveness over time.
Innovation Solution
A duct-shaped separation and filtering device with guiding means and a helically or serpentine-shaped separation surface that causes the airstream to slide along and adhere to the surface, increasing filtration efficiency and extending the servicing interval by utilizing the entire filter surface and depth, and incorporating a final mesh filter for residual purification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If flat filters extending over the entire cross-section of the air duct are used, then the filtration capacity is initially sufficient, but the filter capacity gradually decreases over time requiring frequent maintenance
Solution Approach 1:
The patent applies a helical or serpentine-shaped separation surface instead of a flat filter, creating a curved three-dimensional structure that extends the filtration path. This curved geometry allows the air stream to follow a spiral path through the filter medium, maximizing the utilization of the entire filter surface area and depth, thereby maintaining filtration capacity for longer periods and extending servicing intervals
Solution Approach 2:
The invention transitions from a two-dimensional flat filter to a three-dimensional helical separation surface. By adding the spatial dimension of helical curvature, the filter surface is extended throughout the volume of the air duct, creating a much longer effective filtration path within the same spatial envelope, which improves reliability while reducing maintenance frequency
2Reliability
If the filter surface area is increased to improve filtration efficiency, then the separation capacity increases, but the device complexity and space requirements increase
Solution Approach 1:
The helical separation surface serves multiple functions simultaneously: it acts as the filtration medium support, creates the spiral flow pattern, maximizes surface area utilization, and guides the air stream through the entire filter depth. This multi-functionality achieves high separation efficiency without adding complex separate components for each function
Solution Approach 2:
The helical geometry dynamically utilizes the air stream's kinetic energy and flow patterns, creating a spiral motion that naturally engages the entire filter surface. The dynamic flow path ensures that all portions of the filter medium are actively utilized during operation, achieving high efficiency without requiring static complex structures
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device achieves enhanced separation and filtration efficiency by maximizing the use of the filter surface and depth, reducing the need for frequent cleaning and maintenance, and ensuring nearly complete air purification with a prolonged servicing interval.
Implementation Method 1
guiding means are provided, which are configured to cause the airstream to at least partially slide along the separation surface
Implementation Method 2
The substances, notably the at least a portion of substances, remain adhered to or get caught on the at least one separation surface
Implementation Method 3
DE 10 2007 011 664 A1 discloses a filter device for separation of soil particles, which has a housing with an inlet opening and an outlet opening. Several separation elements are arranged in the housing, which cause a repeated redirection of the airstream. Due to the higher inertia moment of the soil particles in the airstream, said redirection causes a separation of the particles at the surfaces of the separation elements.
Data Source
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AI summary
The present invention concerns a separation and/or filtering device (48) for separation and/or filtering of substances from an airstream. The separation and/or filtering device (48) comprises a duct-shaped casing (60) enclosing a flow region (60a) for the airstream to flow therethrough. At least one separation surface (56) configured to effect a separation of at least a portion of the substances is arranged in the flow region (60a). According to the invention, the airstream at least partially slides along the separation surface (56), wherein the at least one separation surface (56) is configured to cause the separation of the at least a portion of the substances from the airstream. The at least a portion of substances remains adhered to or gets caught on the at least one separation surface (56). Further disclosed is an extraction device (14) comprising such a separation and/or filtering device (48).